diff --git a/devito/operator/operator.py b/devito/operator/operator.py
index 7531294a49..3c5e2f011c 100644
--- a/devito/operator/operator.py
+++ b/devito/operator/operator.py
@@ -965,7 +965,8 @@ def _emit_apply_profiling(self, args):
             if v is not None:
                 if v.oi is not None:
                     metrics.append("OI=%.2f" % fround(v.oi))
-                metrics.append("%.2f GFlops/s" % fround(v.gflopss))
+                if v.gflopss is not None:
+                    metrics.append("%.2f GFlops/s" % fround(v.gflopss))
 
             v = summary.globals.get('fdlike')
             if v is not None: